BreathFresh! Air Purifiers utilize HEPA Technology and CuZn’s patented FilterFoam Technology to cover the full spectrum of harmful airborne contaminants. HEPA technology only accounts for one type of contaminant commonly found in air, physical particulate that is undissolved. There are many types of harmful contaminants thatHEPA filters do not remove because they are not physical particulate, examples include chemicals, volatile organic compounds, gasses and all types of odor. Harmful non-particulate contaminants are leached from a wide variety of sources commonly found in your home. CuZn’s patented FilterFoam technology removeschemicals, volatile organic compounds, gasses and 100% of odor. Don’t get tricked by our competitors carbon pre-filters, only CuZn’s patented combination of reticulated mineral medias are able to handle the wide variety of contaminants found in your home.